feat(instance): add proxy creation functionality

- Add createProxy API method to instanceApi
- Implement proxy creation form in InstanceDetail view
- Add modal for proxy creation with required fields
- Include validation for port numbers

src/api/index.js

@@ -86,7 +86,9 @@ export const instanceApi = {
     getInstanceLogs: (instanceName) => 
         api.get('/frpcAct/instanceMgr/logs', { params: { instanceName } }),
     getInstanceProxies: (instanceName) => 
-        api.get('/frpcAct/instanceMgr/proxies', { params: { instanceName } })
+        api.get('/frpcAct/instanceMgr/proxies', { params: { instanceName } }),
+    createProxy: (instanceID, proxyInfo) => 
+        api.post('/frpcAct/proxyMgr/create', { instanceID, proxyInfo })
 };
 
 export const logApi = {